Turning-lathe.



PATENTBD MAY 12, 1908.

B. TANNBWITZ.

TURNING LATHE.

v APPLIo'ATIoN FILED MAY 14, 1906.

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Wi messes No. 887,148. PATENTED MAY 12, 1908. E. TANNEWITZ.

TURNING LATHE.

APPLICATION FILED MAY 14, 1906.

2 SHEETS-SHEET 2` a fia Witrgesses: lQVeQtn.

A A aM/f@ TINTTED STATES PATENT FFTQIE.

EDWARD TANNEWITZ, OF GRAND RAPIDS, MICHIGAN.

' TURNING-LATHE To all whom it may concern:

Be it known that I, EDWARDk TANNEWITZ, a citizen of the United States,residing at Grand Rapids, county of Kent, State of Michigan, haveinvented certain new and useful Improvements in Turning-Lathes, of whichthe following is a specification.

This invention relates to improvements in turning lathes. It is relatedparticularly to an improved turning lathe for turning round rods. A

The objects of this invention are: First, to provide an improved turninglathe adapted to work upon strips of irregular or varying thickness.Second, to provide an improved turning lathe in which the work is guidedand supported close to the cutters or knives. Third, to provide animproved turning lathe embodying the above advantages, which is notlikely to become clogged. Fourth, to provide in a turning lathe animproved means for holding the cutters or knives.

Further objects, and objects relating to structural detail willdefinitely appear from the detailed description to follow.

I accomplish the object of my invention by the devices and meansdescribed in the following specification.

The invention is clearly dehned and pointed out in theclaims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawings, in which,

Figure l is a longitudinal central section through the structureembodying the features of my invention, taken on a line corresponding toline 1 1 of Fig. 2. Fig. 2 is a transverse section through the cutterhead taken on a line corresponding to line 2 2 of Fig, l. Fig. 3 is adetail end elevation looking from the left into Fig. l. Fig. 4 is a planof the stock guide sleeve C.

In the drawings, the sectional views are taken looking in the directionof the little arrows at the ends of the section lines, and similarletters of reference refer to similar parts throughout the severalviews.

Referring to the drawings, A represents the frame portions of themachine on which `are bearings A A for the arbor l) of the pulley B.This arbor l) is hollow and is interiorly threaded at its forward end toreceive the cutter head D. The cutter head D is provided with a conicalmouth or chamber D in its inner end into which the conical end C of thework guide sleeve C projects. The

Specification of Letters Patent.

Application filed May 14, 1906.

Patented May 12, 1908.

Serial No. 316,770.

mouth D of the cutter head is extended or continued into a cylindricalwork guide d. The Work guide sleeve C is arranged through the hollowarbor b and is supported at its outer' end by the bracket A. The stockopening or hole c of the sleeve C is oblong in cross section. Within thesleeve c is a blade spring C, which is secured at its rear end to thewall of the sleeve and extends forwardly to the delivery end for holdingthe work to the bottom of the sleeve. This hole is so arranged in thesleeve relative to the work guide of the cutter head that, when the workis under pressure of the spring, it is properly centered relative to thework guide.

It is frequently the case that the stock is irregular or varies inthickness; this is especially the case when the stock is ripped fromplanks. My improved guiding sleeve accommodates stock of this character,and obviates the necessity of again running the same through the saw toremove the surplus material.

The conical end of the guide sleeve is provided with annular grooves c.As the end of the sleeve fits close into the mouth of the chuckconsiderable dust from the knives passes up between the chuck and thesleeve. These grooves serve to collect the dust and also to preventfriction at this point. The dust is discharged through the openings D tocutter head, the inner edge of which openings terminates at the eXtremecircumference of the mouth of the cutter head and preferably embracesthe last two grooves c in the end of the sleeve.

Owing to the high rate of speed at which the cutter head travels all thedust which finds its way between the cutter head and the sleeve isthrown out by centrifugal force through the holes D.

The knives E are held by set screws e upon the rests E providedtherefor. The set screws c are arranged through the arms e secured uponthe cutter head by the screws 6; see Figs. l and 2.

It is a common practice in cutter heads of this kind to provide theknives with longitudinal slots and to secure them with screws or boltsarranged through the slots. The frequent grinding required soon wearsthe knives up to the slots; then of course they are useless.

By securing the knives as I have illustrated, they can be used up tovery small pieces, it only being necessary to have the same ofsuflicient length tobe engaged by the set screws.

The arms e are preferably formed separately from the cutter head proper,which is cast, and secured thereto by said screws e, as illustrated.rlhis enables the use of steel for these arms and also simpliiies thecasting, and these arms possess greater strength than would otherwise besecured.

The stock is held and supported by theY sleeve practically to the pointwhere it is acted upon by the knives so that it is not likely to betwisted oli although it may be of Small diameter. This enables theworking up of cross grain trash, or shaky stock and also of shortpieces.

My improved turning lathe is very simple in structure and at the sametime is very effective for the purpose intended. I have illustrated thesame in detail in the form preferred by me, but I am aware that it iscapable ofA considerable variation in structural detail Withoutdeparting from my invention.

Having thus described my invention, what I claim as new and desire tosecure by Let-` ters Patent is:

l. The combination of a revolubly mounted cutter head having a conicalchamber or mouth at its inner end extended or continued into acylindrical work guide, said cutter head having dust discharge openingstherethrough opening into said mouth a stock or work guide sleeve havinga conical end with annular grooves therein arranged in the vconicalmouth of said cutter head for the ed cutter head having a conical mouth,said n cutter head having dust discharge openings therethrough openinginto said mouth; and a stock or work guide having a conical end arrangedin the conical mouth of said cutter head, for the purpose specified.

In witness whereof, I have hereunto set my hand and seal in the presenceof two witnesses.

EDWARD TANNEWITZ. [1.. s.] l

Witnesses:

M. A. ADRION, C. E. TANNEWITZ.

